Torres, Luisa Risk assessment of human exposure to Ra-226 in oil produced water from the Bakken Shale. [electronic resource] - The Science of the total environment Jun 2018 - 867-874 p. digital Publication Type: Journal Article ISSN: 1879-1026 Standard No.: 10.1016/j.scitotenv.2018.01.171 doi Subjects--Topical Terms: Dietary Exposure--analysisEnvironmental Exposure--analysisHumansHydraulic FrackingNorth DakotaRadium--analysisRisk Assessment